The long head of biceps brachii tendon has been known to be a pain generator and a common cause of shoulder pain and dysfunction in patients with rotator cuff pathology. Both biceps tenotomy and tenodesis have been shown to produce comparable results, but there is no consensus to date due to a lack of level I evidence. The aim of this prospective, randomized, clinical trial is to compare subjective patient-reported outcomes and objective clinical results between biceps tenotomy and biceps tenodesis for treating lesions of the long head of the biceps brachii.